SVS-VISTEK
Feature description
50
6.3.2
PWM
Pulse width modulation
Description of the function used within the sequencer or implemented by
the pulseloop module
During Pulse Width Modulation, a duty cycle is modulated by a fixed
frequency square wave. This describes the ratio of ON to OFF as duty
factor or duty ratio.
Why PWM?
Many electrical components must be provided with a defined voltage.
Whether it’s because they do not work otherwise or because they have the
best performance at a certain voltage range (such as diodes or LEDs).
Diode characteristic
Since LEDs have a bounded workspace, the PWM ensures a variable
intensity of illumination at a constant voltage on the diodes.
In addition, the lifetime of a diode increases. The internal resistance is
ideal in this area. The diode gets time to cool down when operated with a
PWM in its workspace.
Implementation of PWM
The basic frequency of the modulation is defined by the cycle duration "T".
7
89:
1
;
89:
Duty cyle "T" is written into the registry by multiple of the inverse of camera
frequency. (15 ns steps) Refer to:
Time unit of the camera
.
7
89:
1
66, 6
∙ PWMMaxASeqSelectorH
15 ∙ PWMMaxASeqSelectorH
T
H E I N T E N S I T Y O F A
P W M :
That duty ratio is calculated as:
Δ
% = t / T. It is written about the value of
"t" as PWMChange0-3[SeqSelector] per sequence into the Registry.
PWMChange0-3[SeqSelector] is to be written as a percentage value.
Содержание HR Series
Страница 1: ...2 06 2019 Manual HR Camera Link hr25 hr29 hr43 hr120 ...
Страница 5: ...SVS VISTEK Safety Messages Contents of Camera Set 5 ...
Страница 14: ...SVS VISTEK Connectors 14 ...
Страница 62: ...SVS VISTEK Feature description 62 In a timings diagram the sequence values above will look like this ...
Страница 64: ...SVS VISTEK Feature description 64 will reflect as following ...
Страница 85: ...SVS VISTEK Dimensions 85 8 1 hr25 CL ...
Страница 86: ...SVS VISTEK Dimensions 86 ...
Страница 87: ...SVS VISTEK Dimensions 87 ...
Страница 88: ...SVS VISTEK Dimensions 88 8 2 hr29 CL ...
Страница 89: ...SVS VISTEK Dimensions 89 ...
Страница 90: ...SVS VISTEK Dimensions 90 ...
Страница 91: ...SVS VISTEK Dimensions 91 8 3 hr43 CL ...
Страница 92: ...SVS VISTEK Dimensions 92 ...
Страница 93: ...SVS VISTEK Dimensions 93 ...
Страница 95: ...SVS VISTEK Dimensions 95 ...
Страница 96: ...SVS VISTEK Dimensions 96 ...